Pickerelweed (Pontederia cordata) is an easily grown perennial pond marginal or submerged plant that flowers with delightful blue flowers.
This North American native belongs in every pond or water garden and here’s how to grow it.
Unless you live very near the arctic circle, you should be able to grow this plant. Think a tough USDA zone 2-3 plant.
- Full sun. It will grow nicely in part shade as well although you may find it stretches a bit or reduces flowering in these areas where sunlight gets a little sparse.
- Plant in constantly wet soil or up to one-foot deep on the edges of the pond. Do not plant in deeper water than this.
- Cut down dead foliage in the fall after frost has knocked it back.
Division in the very early spring is the best. Knock it out of the pot or dig it up and divide as per any other perennial plant. Leave an “eye” or two and some root and replant. This is a tough plant so don’t worry about being gentle.
You can also do cuttings in early spring or sow seed (keep the seed damp at all times in moist sand) and it will germinate in the next spring.
Image courtesy: Marcelo Raidan [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons